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Message-ID: <1d7a7c6e73b4bf3f2177dca0e45d375e77e8388a.camel@infradead.org>
Subject: Re: [PATCH v2 0/2] Support clean reboot after hibernate on Arm64
From: David Woodhouse <dwmw2@infradead.org>
To: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>, Robert Moore
 <robert.moore@intel.com>, "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
  Len Brown <lenb@kernel.org>, Sudeep Holla <sudeep.holla@arm.com>, 
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, 
 linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev
Date: Fri, 12 Apr 2024 15:18:22 +0100
In-Reply-To: <20240412140515.GA28052@willie-the-truck>
References: <20240412073530.2222496-1-dwmw2@infradead.org>
	 <20240412140515.GA28052@willie-the-truck>
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On Fri, 2024-04-12 at 15:05 +0100, Will Deacon wrote:
> On Mon, Mar 11, 2024 at 12:19:14PM +0000, David Woodhouse wrote:
> > When the hardware signature in the ACPI FACS changes, the OS is suppose=
d
> > to perform a clean reboot instead of attempting to resume on a changed
> > platform.
> >=20
> > Although these patches have a functional dependency, they could be merg=
ed
> > separately. The second patch just won't *see* a FACS table if the ACPIC=
A
> > fix isn't present.
> >=20
> > v2: Now that the ACPICA patch is merged upstream, note its commit ID
> >=20
> > David Woodhouse (2):
> > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ACPICA: Detect FACS even for hardware re=
duced platforms
> > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 arm64: acpi: Honour firmware_signature f=
ield of FACS, if it exists
> >=20
> > =C2=A0arch/arm64/kernel/acpi.c=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | 10 +++++=
+++++
> > =C2=A0drivers/acpi/acpica/tbfadt.c=C2=A0 | 30 +++++++++++++------------=
-----
> > =C2=A0drivers/acpi/acpica/tbutils.c |=C2=A0 7 +------
>=20
> Rafael, how would you like the handle this series? The arm64 part has
> been Acked-by Sudeep, so I'm happy with it.

Thanks, Will.

Similar question for Rafael on the guest side of the PSCI SYSTEM_OFF2
series, in particular
https://lore.kernel.org/kvm/20240319130957.1050637-6-dwmw2@infradead.org/#Z=
31kernel:power:hibernate.c
which sets the entering_platform_hibernation flag around the call to
the standard kernel_power_off() function when invoking it for
HIBERNATION_SHUTDOWN.

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